Pressurizer nozzle

ABSTRACT

This invention relates to a nozzle structure for use in a pressurizer machine in glass forming. The pressurizer machine operates to insert a pipe or nozzle into the opening of a glass ribbon and newly formed glass article supported on an apertured orifice plate of a ribbon glass forming machine. Just prior to crack-off of the article from the ribbon in or near the aperture of the plate, the nozzle is inserted below the crack-off line of the glass ribbon and air is emitted in the article to flow out of the mouth opening. Any chips or loose particles of glass as may result at crack-off are carried by the air flow out of the mouth and away from the article. The nozzle structure includes: (1) a frustro conical side wall for baffling or directing air flow upwardly and radially, (2) regulating volume and pressure by the nozzle openings in proportioning their area to the supply pipe, (3) inclining these openings in a 30*-60* inclination to the axis of the nozzle in directing air emission, and (4) providing a carrier-actuator for moving the nozzle-a pressurizer head assembly-whereby the nozzle is moved into the article below the orifice plate elevation in applying the air in the article.

United States Patent [451 Mar. 28, 1972 Small [54] PRESSURIZER NOZZLE [72] Inventor: Owen M. Small, Toledo, Ohio [73] Assignee: Owens-Illinois, Inc.

[22] Filed: Jan. 16, 1970 [21] Appl. No.: 3,328

[52] US. Cl ..65/184, 65/262, 65/264,

65/266, 65/174, 65/348, 65/109, 65/112, 65/113 [51] Int. Cl. ..C03b 5/32, C03b 9/14 [58] Field of Search ..65/184, 166, 109, 23, 24, 112,

[56] References Cited UNITED STATES PATENTS 1,943,195 1/1934 Van Ness ..65/l84 2,184,900 12/1939 Snyder ...68/184 X 2,377,536 6/1945 Wisner ..65/348 2,729,916 l/l956 Casler et a1. 65/184 X 3,125,429 3/1964 Lauck et al. ..65/348 X 3,193,367 6/1965 Gifien ..65/112 X 3,487,501 l/l970 Siard et al. ...65/262 X 3,511,626 5/1970 Wynn ..65/24 X Primary Examiner-Frank W. Miga Atrorney.lohn R. Nelson and Edward J. Holler [57] ABSTRACT This invention relates to a nozzle structure for use in a pressurizer machine in glass forming. The pressurizer machine operates to insert a pipe or nozzle into the opening of a glass ribbon and newly formed glass article supported on an apertured orifice plate of a ribbon glass forming machine. Just prior to crack-off of the article from the ribbon in or near the aperture of the plate, the nozzle is inserted below the crack-off line of the glass ribbon and air is emitted in the article to flow out of the mouth opening. Any chips or loose particles of glass as may result at crack-off are carried by the air flow out of the mouth and away from the article. The nozzle structure includes: (l) a frustro conical side wall for baffling or directing air flow upwardly and radially, (2) regulating volume and pressure by the nozzle openings in proportioning their area to the supply pipe, (3) inclining these openings in a 30-60 inclination to the axis of the nozzle in directing air emission, and (4) providing a carrier-actuator for moving the nozzle-a pressurizer head assembly-whereby the nozzle is moved into the article below the orifice plate elevation in applying the air in the article.

12 Claims, 2 Drawing Figures PRESSURIZER NOZZLE The present invention relates to machines for manufacture of hollow glass articles such as glass bulbs and containers by the so-called ribbon machine process; and, more specifically, the invention pertains to a pressurizer head and nozzle therefor in applying a flow of pressurized air into and outwardly through the moile and mouth of the article while on the glass ribbon of the machine. The present invention is an improvement applicable to the invention disclosed and claimed in the copending application of R. A. I-Ieaton, Ser. No. 245, filed Jan. 2, 1970, and owned by a common assignee with the present application.

In the aforementioned copending application, the pressurizer machine is operated so that a nozzle is inserted into each bottle or bulb article while attached to the ribbon at the time the article is cracked off from the ribbon carried on the orifice chain of the machine.

It is an object of the present invention to provide a directional pressurizer nozzle for compressed air such that when the nozzle is inserted into the article through the mouth opening of the ribbon a predetermined volume of air will be blown through the outwardly angled apertures of the nozzle, the air being directed upwardly in the container during crackoff to prevent chips of glass from falling and sticking inside the article.

Another object is to provide a nozzle design in which the outer surface of the nozzle is flared upwardly and outwardly above the apertures emitting the air to direct air flow through the opening in a prescribed manner and achieve best chip removal at crack-off.

Other objects and features of the invention shall become apparent to those skilled in the art by reference to the following detailed description taken in conjunction with the annexed sheet of drawings on which:

FIG. I is an elevational view, partly in section, of a pressurizer head of the pressurizer machine showing the nozzle of the present invention in operating position.

FIG. 2 is an elevational view, partly in section, of the pressurizer nozzle of FIG. 1.

Referring to FIG. 1, the pressurizer machine includes a wind box disposed horizontally along the movement of the glass ribbon 11. The wind box has an interior chamber 10a and along the underside is an aperture 12 in the form of an elongated slot. The pressurizer machine heads, indicated at 13, are connected together by the carriage links 14 which include a transverse shaft 15 and end rollers 16 thereon. Rollers 16 run in guide tracks 17 to maintain the elevation of the heads 13 overlying the glass ribbon 11. Rigidly connected to link 14 is a cylinder housing 18 and telescopically shiftable pressure shoe 19 that is manipulated by means (not shown) to bring the shoe 19 into engagement with the underside of wind box 10. Centrally of shoe 19 is an air passage that communicates with the aperture 12 of wind box 10 connecting the head 13 with the supply of pressurized air. At the lower end of cylinder housing 18 is another telescopically shiftable cylinder member 20. Internally of head 13 are two springs compressed by the shoe 19 and member 20. The springs respectively urge the shoe l9 and member 20 axially outwardly from cylinder housing 18. This structure is more specifically shown and described in the aforementioned application of R. A. I-Ieaton, Ser. No. 245.

The cylindrical member 20 has diametrically disposed arms 21 rigidly attached thereto which form the supports for stub shafts 22 and 23 respectively. Rollers 24 and 25 are respectively rotatably mounted on shafts 22 and 23 and run on horizontally disposed cams 26.

The pressurizer nozzle, indicated generally as 27, is detachably connected to the lower end of cylindrical member 20 for movement therewith. The nozzle 27 includes a cylindrical, hollow shank 28 and a tip 29 at its lower end. The outer wall surface of tip 29 is circular in its horizontal sections and throughout its elevation, best seen on FIG. 2, is upwardly and outwardly flared to the ring 30 whereat tip 29 is stepped radially to form the annular ledge 31. The axial lower end of tip 29 is closed at end wall 32. A series of apertures 33 are formed through the side wall of tip 29, the axis of apertures 33 being inclined upwardly, such as shown.

Several forms of the inclined apertures may be used, however, it has been found that apertures 33 are best inclined from 30 to 60 from the horizontal (60 to 30 off the central axis of tip 29). The number of apertures and their size is interrelated to performance of the nozzle.

For example, the diameter of the apertures and their number should equal an aggregate area that is approximately one-half the cross-sectional area of central passage 34 in nozzle 27, or may be as much as equal to this central passage area. In the illustration, three rows of apertures are shown. Their number is in excess of 25, or approximately ten apertures per row.

Another form of nozzle (not shown) employs two rows of apertures 33, each row including 10 apertures and each aperture is approximately one-quarter inch in diameter. By supplying air to the pressurizer nozzle from the wind box of sufiicient pressure, say p.s.i., a volume flow of 17.5 CFM at 1.0 oz./in. will produce excellent result in that all chipped glass occurring at crack-off will be expelled from the interior of the glass contained article.

At the pressures and volume indicated for the above examples, the aperture-to-passage area ratio is kept between onehalf and 1.

In most instances, the tip 29 will be lowered to a centered position (FIG. 1). The internal diameter of a glass bottle 35 formed from glass ribbon 11 will be on the order of 40 millimeters. The external diameter of tip 29 is such that across lower end 32 the diameter is approximately 33.27 millimeters whereas across upper ring 30, the largest diameter of the nozzle tip is on the order of 50.8 millimeters. The annularly flared contour resides between these two points. This allows a restricted air passage from the container 35 through the annular space 36. In this arrangement and with misaligned centerto-center or axial match between tip 29 and bottle 35 the air flow has vaired between 16-20 CFM. Yet, chips are eliminated or expelled from entry to the bottle.

With the air flowing from tip 29 as indicated above, the glass article 35 is cracked off from the ribbon 11 along the line, such as indicated in dashed lines 37 on FIG. 1. One manner and means of achieving crack-off is as follows. The orifice plate 38 being an apertured chain or carriage, travels horizontally in guides of the machine and is the pacesetter of the process of forming articles, such as 35. The plates 38 have spaced apertures or orifices defined by annular surface 39. This surface 39 is inclined so as to be frustro-conical or tapered to define one sharper edge. The glass formed through orifice surface 39 is thinnest at this sharper edge and therefore most reliably fractures at that point. A striking member 40 is supported by a rod 41 extending through a bearing guide in member 42 fastened to the frame of the machine (not shown). Along the upper part of rod 41 is a fixed washer 43 that forms a collar for spring 44. The spring is compressed between collar 43 and member 42. The top end of rod 41 has a U-shaped yoke 45 supporting a shaft 46 supporting cam roller 47. The spring 44 holds roller 47 into constant engagement with irregular (eccentric) shaped rotary cam 48 that is rotated under power of motor M. Rotation of cam 48 through one revolution imparts one complete reciprocating stroke to the hammer 40 striking it sharply against orifice plate 38. The impact of the plate and its vibration relative to the glass in the orifice tightly against surface 39 thereof results in the crack-off.

After the glass cracks or severs along line 37, the bottle 35 drops by gravity to be received by a U-shaped support tongs 50 carried along the side of orifice plate 38 for a way. After the ware settles in tongs 50, the latter move away from ribbon 11 to a transfer location. During this transfer, a ring 51 closes loosely about the ware to steady it and prevent slipping from the open side of the tongs 50. 1

The pressurizer head 13 travels relative to cam 26 for raising and lowering nozzle 27 into and out of the glass article 35 through the topside opening formed in the ribbon. At some stage in travel, the nozzle is held in a raised position for an extended period. For this purpose the latch mechanism 55 is pivotally supported on the bracket 56 integral with the lower cylinder 18 on links 14. The latch is spring biased (not shown) to pivot a ratchet 58 and engage the under surface 57 thereby holding the nozzle in an uppermost, raised position. Cam 26 is thereafter discontinued for a way in the endless travel of heads 13 of the machine. As it may be time to lower nozzle 27, latch mechanism 55 includes a roller 60 which engages a trip cam (not shown) rotating latch 55 to disengage ratchet 58 and surface 57 freeing nozzle 27 to lower by force of internal spring compressed in head 13.

While one embodiment of the invention has been disclosed and described in detail, it will be apparent to those skilled in the art that the disclosed embodiment may be modified. Therefore, the foregoing description is to be considered exemplary rather than limiting, and the true scope of the invention is that defined in the following claims:

I claim:

1. A pressurizer nozzle for use on a glass ribbon machine wherein a ribbon of glass in formible state is supported on an apertured conveyor and glass of the ribbon extends through the apertures and depends below said conveyor, said depending glass being blow molded to hollow article shape with an upper end opening, means supporting the pressurizer nozzle and means connected to the nozzle for moving it into the article through said end opening to a lowered operating position, said nozzle comprising a pipe having a central passage, a source of air under pressure, means connecting said source of air to one end of said pipe, and a nozzle head at the opposite end of said pipe, said nozzle having an outer axial end wall, an annular and outwardly flared side wall, and a series of upwardly inclined apertures arranged annularly about said side wall and extending through said flared wall, the annular wall being spaced from and in close proximity to the inside surface of said glass article at said end opening when said nozzle is in its said operating position, and means connecting the central passage of said pipe to each of said wall apertures, whereby air supplied to the pipe is directed by said apertures outwardly and upwardly along said flared side wall and past said inside surface of the glass article adjacent said nozzle annular wall.

2. The nozzle of claim 1, wherein said flared side wall defines a truncated frustoconical shape.

3. The nozzle of claim 1, wherein said apertures are inclined upwardly at an angle that is within the range of 30 to 60 in relation to the axis of the pipe.

4. The nozzle of claim 1, wherein the total cross-sectional area of all said apertures is equal to at least one half the total cross-sectional area of the central passage of said pipe.

5. The nozzle of claim 1, wherein the total cross-sectional area of said series of apertures is in their aggregate at least equal to the cross-sectional area of the central passage of said pipe.

6. The nozzle of claim 5, wherein the series of apertures in annular array in said nozzle wall comprise two annular rows of said apertures, each row being axially spaced on said wall from the other said row.

7. In a glass ribbon forming machine including an apertured orifice chain, means for moving the orifice chain horizontally, the orifice chain supporting a ribbon of glass and an integral downwardly depending blown hollow glass article disposed through the aperture of said orifice chain and depending below said chain, the article having an upper end opening adjacent the aperture of said chain, a pressurizer'head, means supporting said pressurizer head for horizontal movement over said orifice chain aperture, said pressurizer head comprising a downwardly depending air pipe, means connecting said air pipe to said head for axial shifting movement, driving means connected to said air pipe for shifting the pipe axially on said head, the improvement therein comprising a nozzle attached to the lower end of said air pipe, said nozzle including a tapered annular side wall and an end wall, a series of upwardly and outwardly directed air apertures throu h said side wall, said senes of apertures being spaced annular y about said side wall, means connecting each of the air aperturesto said air pipe, a pressurized source of air, and means on said head connecting the air pipe and said source of air, the drive means being operated for shifting said air pipe and inserting said nozzle within the article end opening in an operating position, whereby air is emitted from said nozzle apertures for flow from within the article and upwardly out of the end opening of said article.

8. The combination of claim 7, wherein the tapered annular side wall of said nozzle is axially upwardly and outwardly flared.

9. The combination of claim 8, wherein the apertures are angularly oriented in the side wall of said nozzle and inclined at an angle in the range of 3060 from the axis of the nozzle.

10. The combination of claim 9, wherein the cross-sectional area of all of said apertures in the nozzle is at least equal to the internal cross-sectional area of the pipe at its smallest internal diameter.

11. The combination of claim 10, wherein the annular array of apertures in the side wall of the nozzle comprises two axially spaced, annular rows of apertures in the side wall of the nozzle.

12. The combination of claim 11, wherein the air provided by the source is emitted at the apertures at approximately one ounce per square inch and the total volume of air emitted by said apertures is at least 17 CF M. 

1. A pressurizer nozzle for use on a glass ribbon machine wherein a ribbon of glass in formible state is supported on an apertured conveyor and glass of the ribbon extends through the apertures and depends below said conveyor, said depending glass being blow molded to hollow article shape with an upper end opening, means supporting the pressurizer nozzle and means connected to the nozzle for moving it inTo the article through said end opening to a lowered operating position, said nozzle comprising a pipe having a central passage, a source of air under pressure, means connecting said source of air to one end of said pipe, and a nozzle head at the opposite end of said pipe, said nozzle having an outer axial end wall, an annular and outwardly flared side wall, and a series of upwardly inclined apertures arranged annularly about said side wall and extending through said flared wall, the annular wall being spaced from and in close proximity to the inside surface of said glass article at said end opening when said nozzle is in its said operating position, and means connecting the central passage of said pipe to each of said wall apertures, whereby air supplied to the pipe is directed by said apertures outwardly and upwardly along said flared side wall and past said inside surface of the glass article adjacent said nozzle annular wall.
 2. The nozzle of claim 1, wherein said flared side wall defines a truncated frustoconical shape.
 3. The nozzle of claim 1, wherein said apertures are inclined upwardly at an angle that is within the range of 30* to 60* in relation to the axis of the pipe.
 4. The nozzle of claim 1, wherein the total cross-sectional area of all said apertures is equal to at least one half the total cross-sectional area of the central passage of said pipe.
 5. The nozzle of claim 1, wherein the total cross-sectional area of said series of apertures is in their aggregate at least equal to the cross-sectional area of the central passage of said pipe.
 6. The nozzle of claim 5, wherein the series of apertures in annular array in said nozzle wall comprise two annular rows of said apertures, each row being axially spaced on said wall from the other said row.
 7. In a glass ribbon forming machine including an apertured orifice chain, means for moving the orifice chain horizontally, the orifice chain supporting a ribbon of glass and an integral downwardly depending blown hollow glass article disposed through the aperture of said orifice chain and depending below said chain, the article having an upper end opening adjacent the aperture of said chain, a pressurizer head, means supporting said pressurizer head for horizontal movement over said orifice chain aperture, said pressurizer head comprising a downwardly depending air pipe, means connecting said air pipe to said head for axial shifting movement, driving means connected to said air pipe for shifting the pipe axially on said head, the improvement therein comprising a nozzle attached to the lower end of said air pipe, said nozzle including a tapered annular side wall and an end wall, a series of upwardly and outwardly directed air apertures through said side wall, said series of apertures being spaced annularly about said side wall, means connecting each of the air apertures to said air pipe, a pressurized source of air, and means on said head connecting the air pipe and said source of air, the drive means being operated for shifting said air pipe and inserting said nozzle within the article end opening in an operating position, whereby air is emitted from said nozzle apertures for flow from within the article and upwardly out of the end opening of said article.
 8. The combination of claim 7, wherein the tapered annular side wall of said nozzle is axially upwardly and outwardly flared.
 9. The combination of claim 8, wherein the apertures are angularly oriented in the side wall of said nozzle and inclined at an angle in the range of 30*-60* from the axis of the nozzle.
 10. The combination of claim 9, wherein the cross-sectional area of all of said apertures in the nozzle is at least equal to the internal cross-sectional area of the pipe at its smallest internal diameter.
 11. The combination of claim 10, wherein the annular array of apertures in the side wall of the nozzle comprises two axially spaced, annular rows of apertures in thE side wall of the nozzle.
 12. The combination of claim 11, wherein the air provided by the source is emitted at the apertures at approximately one ounce per square inch and the total volume of air emitted by said apertures is at least 17 CFM. 